He had been driving the little girl to her first day of school when he pulled his four-wheel drive into the emergency lane and asked her to climb into the front seat.

He then carried her to the railings and dropped her 58 metres to her death as his two sons, aged two and six, watched on.

Freeman has pleaded not guilty to murder on the grounds of mental impairment.

During a two-week trial, his state of mind was scrutinised.

Chief Crown prosecutor Gavin Silbert SC urged the jury to dismiss the expert diagnosis of the defence witness, Professor Graeme Burrows, who testified Freeman was in a state of dissociation when he killed his daughter.

Professor Burrows told the jury Freeman was suffering a major depressive disorder and could have been psychotic at the time.

Mr Silbert labelled Professor Burrows a "psychiatrist of last resort".

Two psychiatrists, who testified on behalf of the Crown, disagreed with Professor Burrows' diagnosis.

They told the court had Freeman been in a state of dissociation, he would not have been able to get the children ready for school, drive through peak-hour traffic, hold phone conversations, or pull safely to the side of the bridge and put on his hazard lights.

In his closing address, Mr Silbert asked the jury to consider Freeman's distinctive appearance - his unkempt long hair and permanent blank expression.

He told the court in January 2009 Freeman had been clean-shaven with short hair.

"Ask yourselves now why he adopts the Rasputin-like appearance of a mad monk," Mr Silbert said.

Defence lawyer David Brustman called on the jury to consider why a man would commit a "truly horrible" crime.

"Very few cases could induce more prejudice... There in the dock sits a man who flung a four-year-old girl, his own daughter, to her death," he said

"Now, how bad does that get? Is this simply the face of pure evil?"

Mr Brustman argued the killing of the girl was done by a mentally impaired man rather than a father intent on punishing his ex-wife in the worst possible way.